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On immediate offer:- 1) 'Alaska 1:24 000 series orthophotomap (topographic)' : a block of 12 col. photomaps (quadrangles within main sheet numbers A-2 - A-4 and B-2 - B-4, covering area approx. N 70 degrees 7 minutes 30 seconds - 70 30 00/W 147 degrees 36 minutes 0 seconds - 149 06 00), from aerial photogr. of June 1970 (Washington DC : US Geological Survey, 1971). NB: ONE SET ONLY 2) 'Alaska 1:50 000 series (topographic)' : a block of 6 col. maps (quadrangles within main sheet numbers A-2 - A-4 and B-2 - B-4, covering area N 70 degrees 00 minutes - 70 30/W 147 degrees 36 minutes - 149 24), from aerial photogr. of 1955 and selected hydrogr. data of 1956 (Washington DC : US Geological Survey, 1967) ; contour interval 50 feet with 25 feet interpolated. MULTIPLE SETS AVAILABLE. No-one with an interest in the area of Prudhoe Bay prior to discovery of the oil reserve and subsequent construction of pipeline can afford to be without a set! Further details about, and clamorous demands for, these freebies are obtainable from - Map Room, RGS-IBG, 1 Kensington Gore, LONDON SW7 2AR [e-mail: [log in to unmask]; fax : 020-7591-3001] Francis Herbert [log in to unmask] http://www.rgs.org [see 'Collections']